Question

resolva as equações:
x!=30
(x-2)

Answer 1

x!=30(x-2)!

x(x-1)(x-2)!=30(x-2)!

x^2-x-30=0

Δ=1+120
Δ=121

x'=1+√121/2
x'=1+11/2∴x=12/2=6

x"=1-11/2=-10/2=-5